Scale



`lune l5 1926.

J. C.- MATH EWS SCALE Filed Sept. 11, 1922 4 Sheets-Sht 1 June 15 1926.

l J. c. MATHEws SCALE Filed Sept. l1. 1922 4 Sheets-Sheet 2 L 3 5 Z u June 15 1926.

- J. C. MATHEWS SCALE Filed Sept. l1, 1922 4 Sheets-Sheet 3 38 f 37 aan, .a5 32a, f w 123 z] +711, l2! l 2i s 4*/ I IIZ'( Il [2l D. [25 76 Zw i 2 Y L *z 27 20 ,25' O 9 30 37 4.044 9 U 24`. 27Zv zz lx l' af 1' l 5v i sa l 0| zv 2/ A -l HM Humm f June 15 1926.

1,588,975 J. c. MATHEws SCALE Filed Sept. l-l, 1922 4 Sheets-Sheet 4 Patented June 15, 1926.

UNTED STATE@ PATENT FFCE.

JOHN C. MATHEXUS, OF DETROIT,

BIICHIGAN, ASSIGNGR T THE STANDARD COMPUT- ING SCALE COMPANY: OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

SCALE.

Application led September This invention relates to spring scales of the type sho-wn in the joint application of lio Jacnichen and m lf, filed May 26,

Serial No. 563,799, i.- vhich indicatineclianisi'n is moved progressively throngl'i equal distances for equal increases in the load on the scale, and which is pro- 'fided with a movable supporting mechanism for the load resisting springs which permits the springs to be .so elevated as to return the weight indicator to zero position after being moved therefrom by the force of a` load, while at the same time a tare iiidicator is moved from Zero position an indicating distance equal to that through vhich the weight indicator has been returned, and its object is to provide means for setting the weight indicator to Zero withont affecting the zero adjustment for the tare indicator and to provide auxiliary weight and tare indicators on the opposite side of a case containing the mechanism so that the weight or tare may be rea-d simultaneously from a plurality of positions.

This invention consists in a weighing scale. in combination with a shaft for the weight indicators and a weight indicating pointer on each end thereof, of a pair of sleeves rotatably mounted concentric with the shaft and a tare indicator mounted on each sleeve, gearing for causing the. two sleeves to rotate together, load resisting means to which the weight and tare indicators are connected, and means to change the position of the load resisting means to move the weight indicators in one direction and the tare indicators in the opposite direction. l

lit further consists in connected weight indicators and connected tare indicators mounted to rotate on the same axis, over two circular charts.

It also consists of means for adjusting the tare indicators on their axis relative to each other.

It also consists of means for adjusting the connections between the weight and tare indicators and the weight resisting mechanism so that the indicators may be set to zero position when the. scale is unloaded.

It also consists in the details of construction illustrated in the accompanying drawing and particularly pointed out in the claims.

'55 ln the accompanying drawings, Fig. 1

is a front elevation of the upper portion of a scale embodying my present invention. Figs. 2 and 3 are together a section on the line 2-2 of Fig. 1 on a larger scale. Fig. 4 is a front elevation of the support for the indicators. Fig. 5 is a section on the line 5-5 of Fig. 4. Fig. 6 is a section on the line 6-6 of Fig. 3. Fig. 7 is a .section on the line 7 7 of Fig. 8. Fig. 8 is a plan of the cross bar to which the upper ends of the springs are connected. Fig. 9 is a section on the line 9-9 of Fig. 5. 10 is a section of a portion of the rim of the case. Fig. 11 is an elevation of the adjusting mechanism between the two tare indicators.

Similar reference characters refer to Alike parts throughout the several views.

The construction shown in Figs. 1 and 2 embodies a substantially cylindrical case 1 having glass closures 5, carried by circular rings 3, held in position by occasional clips 6, as shown in Fig. 10. rlhe case 1 hasn neck 7 which in turn rests on a pedestal S of any desired height. This pedestal rests on a base which is not shown but within which are the usual scale levers which connect to the weight resisting springs 9 and to the weight indicator rod of well known construction and which forni no part of the present invention. It may be said that in this scale, as in many others, the rod 10 moves up and down with the lower ends o' the springs.

Mounted within tl'xe case is spider having a ring 12, arms 13, 14 and 15, and hub 16. Screws 17 secure this ring to the brackets 19 extending inward from the case 1 and shown in dotted lines in Fig. 1. Dials 21 are mounted in the case and have central holes for the hubs of the tare indicators.

Referring now to Figs. i and 5 which show the hub 16 of the spider and the indicating mechanism, a frame is secured to this hub by means of the screws 22 and consists of a front cross bar Q3, a post 24 and an arm 25 which carries the adjustable bearing ringl 26 and balls 28 for the collar 29 on the rear end of the weight indicator shaft 30. The ring 31 and balls 33 support the front collar 34 on this shaft. A collar 35 is attached to each end of this shaft to which the weight indicating pointers 36 and 36a are secured by means of the screws 37 and washers 38. On this sha-ft is a pinion 39 engaged by the rack bar tlwhose lower end connects to the rod 10. In order to keep the rack bei in mesh with the pinion, a guide pin Ll2 is mounted in the post 24, as shown in Figs. 5 and 9, and has s slo in which the rack hai' is guided and a pointed snppoiting portion 114i. rlhis nel: bei' inoves up and down with the load receiving psits ot the seele9 that is. with the loxvei1 ends olf the springs 9.

'Ihre indicatingl pointers el@ and etti sie seein-ed to sleeves il? ond 4.721 which are iotltshle on the hubs 48 on the cross bei' 23 :ind the :ii-in 25. The sleeve el? hes spur teeth 119 `which mesh with a` rack hay :30 which is guided h v the clip 51 and held in engagement with the teeth by ineens oit :ir spring afin Whose tension is adjusted hv ineens of a screw rl"his reel; hai' connects to the support for the load stimmstn inzg springs and the inechenisin hereinafter described has for its purpose to reise the supporting device oi the springs sellieiently to Carry the Weightl indicating poinier beek to zero after the load cont-einer has heen placed on the scale in order to deduct the tare. rllhe 1fach hars i0 and 50 ziie substantially parallel to each othei` and ere on opposite sides of the shaft 30.

Mounted in the lugs 27 extendingfrom the supporting freine is a shaft 27 having :i segment 32l attached to one end and Bieshing with the' teeth 9 on the sleeve 4-7 end on the opposite end is looselyv nounted n second segrneifn 32a meshing with the teeth on the sleeve 47'. An ern 111 is attached to the shfiit QT adiacentthe seonient L (Figs. and 11) and has sin out-turned end 1320 engaged hv the tivo set sei'evs 121 mounted in the :Urin 122 of this segginent 3f. sz'ievv 123 is slidahle in :i slot 1211 in the si'n 122 and prevents endvvise movement o the segment. This oeniits seen 'ste adjustnient ol the tei-e" indicators i6 end 16a so that hoth iney indicate the sinne amount. ln oi'dei' to obtain accu ete meshing,T oi the teeth on the segments With therteeth on the sleeves and 47a, the holes in the lugs 27 iney he en urged to cerny eithei' end of the shaft. Q7 towel-d th shaft 3,. lilet-ended seievvs "h are mounted in these lugs t) nfoss :isz-sii? t the shaft and hold the teeth in Droger inesh. As the shaft Si@ turns von,v seldom and then onlj,T through few degrees. these .seiews 1e quite satisfeetoij-J for the purpose desei'ihed. mi e Y. e 1

ine ioice oi the loivei` ends of the inannei' and these load is tiensniit'ed to the sinings .9 i i enf; desired springs are Connected to hat (Fig. 7) hy ineens of the holts 56 ind @upped ivashei's 5'? oi which the springs are djustshly mounten1 rl`his cross hei rests on s pivot 58 etth nope? end of o veiftioslly lslidshle iod ,smiled hy the guides and 61 attached the pla-te 62 While/li. .is secured to the of the noch 7 in any desired manner, screws (SS- l being shown.

Extending through e slot Gil in this s`idehle iod (39 end mounted on the pin 6; is e hei' (i5 having pins 67 in its ends to which the links U8 attach. rhese linlis connect et 'their 'Sippe' ends to the pins (S9 in the end elf the hsi inoonted on the pin 71 ce'imied lates 72 it the end oi' the erin 73 of a l'ieli--Clsnh levei Whose othei' nin [5 is the ieee-control erin ot the seele. ,Swinging die :,iiin T5 down towei honzontzil position lifts tlm cross oar vfhieh suipots the sgr'ngs and with them the Whole Weight snpoi'ting and indicating system. Y

The sein 'i' is .nonnted on s pin ii/l: eeriied by a hisffe 'To which extends doivn from the top ot' the ease to which it is secured i5' die sereiv 'l It is also seeii'ed to the ring; 12 by screws its loivei end etteehed lo the spider anni 13 hy sefews 79 and this lovvei end is oinied with lugs (not shown) to ieeeive the shzi'it 80.

@n the ontei` end of this shaft is hand Wheel o1' button 83 hy ineens of which this shalt Yand the Worin Se thieon may life turned. This Worin meshes With the Worin Wheel 8G which loose on the shaft 7 The aiin 75 ceri-ie i pin Si" on which e pim'l Sti is mounted z' this piiwl is pif against the teeth of tie Worin Wheel hy the spi-in i" pin on this erm entries u Whose long` X i V "he iod 96, sli( 'if his i'od is ioieed down i l the opei'stol' pressingl on th cylindrical csp 5)7 Whiffh is noi'n silly piing 9U. lilhen this pushed in. the dog;I hi s up the pmvl engagement with the Worin Wheel teeth r-llhe reel: her toi' operati. t l ind'ezitoi' i6 is sttsehed to s siglati h: ioi'nied of tivo pziits 104 sind '115 which is rotatably mounted on the Nreduced er end oi" 10G esi' 'ied h v e bloei;

e s level1 s vstei si il therefore to the spiings 9, equalize/L' oo While the tefe mel; connect. the pests 104A and 105 which are on the seieiv 1046 and do not move longinoinellj.v theieo When thisl sere turned to niove up or down leeltive to the blo-el; 107 and the Weight wel: bei'.

ifi seeiv 110 is mounted in stationary lllQl-d. lOOSS lll Q11 the neck Y, when.

the arm 75 is released and swung up to normal position, the screw 106, rests on this screw 110. When the screw ll() is turned, the screw G and the tare rack bar 50 move up or down so that the tar indicator may he set to zero on the chart. lVhcn the screw 106 is turned, the block 107 and the equalizer and all the parts connected thereto are moved up or down and the weight indicator thereby set to nero. l `he indicator is therefore first to Zero and thereafter the weigh-t indicator.

il/*hen the scale is properlv adjusted and empty, the indicating hands o6 and 536 and l5 and e6 should he at zero. llv/"hen an empty hex, case or other standard container, or truck or barrow, is placed on the scale, the hands 36 36 will indicate its weight, but the tare hands and -lG will remain stationary at zero. The operator, while the container remains on the scale, then swings down the arm 75, the pawl S8 riding over the teeth of the worm wheel, and he thereby lifts the rod 59, the cross har o5, the springs 9 and the parts connected to the lower ends thereof, including' the rack oar 40, until the weight indicators and again point to zero. This movement of the lever 75 lifts the rod and with it the block 107, the screw 106. the two parts 10ft and 105 and the tare rack and swings the tare pointers il@ and -fl- Ga in the opposite direction to the movement of the pointers 8 and 36a but te the saine e"- tent, so that the tare pointers J6 and Ga will now ir 1icate the weight of the container on the scale., that is, the tare.

1idlhen articles to he weighed, are now Alaced in the container, the hands and 3S will move and indicate the net weight thereof, but the tare indicator will remain stationary and continue to indicate the tare weight of the container'.

lt is evident that this scale is as adapted for ordinary weighing as any other standard scale, for when the tare hands" are at Zero, the total weight of any load placed on the scale, is .indicated hy die weight hands 236 and 35, The tare mechmn i remains ie un the arm 7.3 is swung down.

litten-tion is called to Le fact that the .veight indicating nechanism has no ccnnection whatever with the tare indicators and its operating mechanism and that fore no additional friction results from this additional tare mechanisn'i. @ne is entirely independent of the other in its operation. The Afriction of the tare mechanism is overcome by a manually op rated lever and is therefore absolutelyY immaterial so far as the accuracy of the scale is concerned.

It is evident that the teeth of the worm wheel S6 are not suliiciently numerous for accurate adjustment When using only the pawl 88. The operator therefore moves the one this purpose. ihi lar i j almost instantly and l s no @Lect on th n' :ghing capacity of the scale, that is, 1t

has no eifect on its accuracy.

"`he details of conc-,tru portions of the parts may all he sliiilled scale makers with :t depurtin fron' the spirit of invention a? set forth in the following claims.

l claim l. In a scale, a pair of alined circular charts, a weight indicator and a tare incicator mounted to turn over each chart on a common axis, a shaft to which the weight indicators are attached, supporting devices for the tare indicators co-axial. With said shaft hut independent thereof, gearing operatively connecting the tare indicators, weight resisting means, movable support therefor` and a connection between the supporiI and the tare indicatore. i

2. In a scal, a pair of alined circular char-ts, a weight indicator and a tare indicator mounted to turn over each chart on a common a :is, a shaft to which the weight indicators are attached, supporting devices for the tare indicators co-a-iial with d shaft hutindependent thereof, operatively connectingl the indicators, weight resistin0r means, a movable support therefor, a connection between the support and the tare indicators, and manually operable means to position the support.

3. In a scale, a pair of alined circular charts, a weight indicator and a tare indicator mounted to turn over each charton a common axis, a shaft to which the weight `indicators are attached, supporting devices for the tare indicators co-aiiial with said shaft but independent thereof, gearing operatively connecting the tare indieeters.y weight resisting means, a movable support therefor, a connection heu-.veen the support and the tare indicators, a vertically movable bar on which the support is mounted, and means to adjust the connection to the tare indicator relative to said bar.

4. In a scale, a pair of aline-d circular charts, a weight indicator and a tare indicator mounted to turn over each chart on a common axis, a shaft to which the weight indicators are attached, supporting devices for the tare indicators co-aXial with said shaft but independent thereof, gearing operatively connecting the tare indicators, weight lll() resisting means, a movable support therefor, a connection between the support and the tare indicators consisting ot a toothed sleeve connected to the indicator, arack bar meshing with the toothed sleeve, and an adjustable connection between said support and raclr bar.

5. ln a scale, a circular graduated chart, a weight indicator and a. tare indicator mounted to turn over the chart on a common axis, weight resisting means, a movable support ifor said weight resisting means, a connection between .the support and the tar indicator embodying' a screw whereby said connection may be adjusted, a stationary support, and a screw mounted therein upon which the iirst named screw may rest when the second screw is turned to carry the tare icator to zero position.

6. ln a scale, a weight indicator, a tare indicator, resilient weight resisting means and an adjustable support for one end thereo'l", an operative connection between the other end ot' the weight resisting means and the weight indicator, a screw to limit the movement oi' said support in one direction, and manually adjustable means connecting said support and the tare indicator.

7. ln a scale, a pair ot load resisting` springs having normally stationary upper ends, :i weight indicator adapted to move in proportion to the expansion ot the springs, a support for the springs, a screw mounted thereon. i second screw and a stationary support therefor, said second screw normally adapted to adjustably support the first screw and the sprinp structure, a tare Y indicator. a connection between the tare indicator and the tiret named screw1 and adjustable means :tor moving` the springjr structures and indicators relative to the second screw.

8. ln scale, weifgjht and tare indicatingl devices, a spring structure and a. support for one end thereof, means connecting the opposite end oi the spring` structure to the weight indicator and the support to the tare indicator so that the movement of the spring structure and support together in one direction will move the indicators in opposite directions, and adjustable means limiting the movement of the support in one direction so that the indicators will be at zero position when the scale is unloaded.

9. ln a scale, weight and tare indicating devices, a spring structure, adjustable connection between the spring structure and the tare indicator, means to vary the position of the spring structure to nuove the tare indicator to either indicate tare or Zero, and adjustable means to support said spring structure when the tare indicator is at Zero position.

l0. ln a. scale, a weight indicator and a tare indicator, weight resisting springs, means connecting to the springs and weight indicator whereby t-he weight indicator moves in proportion to the movement oi? the lower ends ot the springs, an adjustable connection whereby the tare indicator is caused to move in proportion to the movement ot the upper ends ot the springs, means to more the spring structure up and down, and an adjustable support "for the spring structure.

1l. ln a scale, a weight indicator and a tare indicator, weight resisting means and a support therefor, connections between the weicht resisting means and the weight indicator, adjustable connections between the tare indicator and the support embodying a screw, and a' second screw in alinement 80 with the tirs'4 to adjustably carry said sup- ALaortand the parts mounted thereon when the tare indicator is inoperative.

l2. in a scale, weight resisting means, a support therefor, means to indicate the ope5 eration ot the weight resistingmeans, means to vary the position ot said suppora means to indicate such variation in position, and means tor varying the connection between said support and the last named indicating 9o means.

i3. In a scale, a pair springs having' normally stationary upper ends, a weight indicator connected to the lower ends ot th springs adapted to move in proportion to the expansion ot the springs, a support tor the springs, a screw mounted thereon, a second s rew and a stationary support therefor, said second screw normally adapted to adjustably support the tiret screw loo and the spring structure, a tare indicator, a connection between the tare indicator and the first named screw, a -d manually operable lever tor movingl the spring structures and weight indicators relative tothe second screw. i

Cil

oi load resisting` 

